Terminal Device Dynamic Subcarrier Spacing Configuration
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Solution Overview
Problem
Current communication systems, such as those based on E-UTRA and LTE-Advanced, face inefficiencies in supporting multiple subcarrier spacings, which can impact communication performance and compatibility in heterogeneous networks.
Innovation Solution
The implementation of a communication method and apparatus that allows for the use of multiple subcarrier spacings in terminal and base station apparatuses, enabling efficient communication by aggregating different frequency bands through carrier aggregation and managing subcarrier spacings dynamically in both the frequency and time domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single subcarrier spacing is used in the communication system, then the system structure is simple and compatible with existing E-UTRA/LTE standards, but the communication efficiency and adaptability in heterogeneous networks are limited
Solution Approach 1:
The patent introduces dynamic subcarrier spacing configuration where the subcarrier spacing can be changed according to different service requirements and network conditions. The base station can dynamically adjust the subcarrier spacing for different uplink channels (PUCCH, PUSCH, PRACH) based on the specific communication scenario, enabling the system to adapt to heterogeneous networks while maintaining manageable complexity through controlled dynamic adjustment rather than complete flexibility
Solution Approach 2:
The patent changes the subcarrier spacing parameter from a fixed value to a configurable parameter with multiple possible values. By allowing the subcarrier spacing to take different values (e.g., 15 kHz, 30 kHz, 60 kHz) depending on the service type and network conditions, the system achieves better adaptability to heterogeneous networks while the parameter itself remains a controllable communication parameter rather than a structural change
2Productivity
If multiple subcarrier spacings are supported, then communication efficiency and data transmission rates are improved, but the complexity of managing frequency and time resources increases
Solution Approach 1:
The patent segments the uplink channels into different types (PUCCH, PUSCH, PRACH) and applies different subcarrier spacing configurations to each type based on their specific requirements. This segmentation allows the system to support multiple subcarrier spacings for improved data transmission rates while managing complexity by having predetermined configurations for each channel type rather than requiring complex real-time decisions for every resource allocation
Solution Approach 2:
The patent establishes predetermined subcarrier spacing configurations for different uplink channels before actual communication occurs. The base station configures the appropriate subcarrier spacing for each channel type in advance based on the service requirements, eliminating the need for complex real-time resource management decisions and reducing the operational complexity while still enabling high data transmission rates when needed
3Productivity
If flexible subcarrier spacing configuration is implemented, then communication efficiency in heterogeneous networks is enhanced, but compatibility with existing E-UTRA standards may be compromised
Solution Approach 1:
The patent applies different subcarrier spacing configurations to different uplink channels (PUCCH, PUSCH, PRACH) based on their specific local requirements rather than changing the overall system configuration. This local quality approach allows flexible subcarrier spacing configuration for specific channels to enhance communication efficiency in heterogeneous networks while maintaining compatibility with existing E-UTRA standards for the overall system architecture and other channels
Data Source
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AI summary
To provide a terminal apparatus and a communication method that enable a communication apparatus (terminal apparatus and/or base station apparatus) supporting multiple subcarrier spacings to perform efficient communication. A terminal apparatus transmits or receives a signal, configures a subcarrier spacing to be used for transmission or reception of the signal. In a case that the signal includes data of the SRB, the subcarrier spacing to be used for transmission or reception of the signal is a first subcarrier spacing, and in a case that the signal includes data of the DRB, the subcarrier spacing to be used for transmission or reception of the signal is a second subcarrier spacing.